| 姓名 | 李政修(Cheng-Hsiu Li) | 電子郵件信箱 | s9211634@mail.cyut.edu.tw | |
| 畢業系所 | 營建工程系碩士班(Department and Graduate Institute of Constrction Engineering) | |||
| 畢業學位 | 碩士(Master) | 畢業時期 | 94學年第1學期 | |
| 論文名稱(中) | 應用雷達干涉進行數值地形之生成 | |||
| 論文名稱(英) | A Study on DEM Generation with InSAR technology | |||
| 檔案 |
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。 |
論文使用權限 | 校內外完全公開 | |
| 論文語文/頁數 | 中文/80 | |||
| 摘要(中) | 合成孔徑雷達干涉技術（Synthetic
Aperture Radar Interferometry, InSAR）是獲得數值地形的利器。近年來，合成孔徑雷達影像（Synthetic
Aperture Radar, SAR）已廣泛地被運用於地球表面的探測且成效良好。InSAR
是藉由衛星所傳送的微波訊號與地形或地貌產生反射，利用兩組天線同時接收同一區域或利用同一顆衛星在不同時間接收同一區域所反射訊號；因為被反射的訊號到接收天線間的距離不同，致使訊號的相位產生改變。這被改變的相位，正是用來推估地面上相對高程之依據，進而建立所拍攝區域之數值地形。本研究採用
ERS-2 衛星所拍攝之合成孔徑雷達影像；ERS-2
衛星所發射與接收的微波，其波長較可見光的波長來的長且其所發射的微波較可見光有較佳的穿透性，使得微波能具體地描述地形的變化而不受到地表面植物生長情形的影響。 本研究以台灣北部區域為標的，進行合成孔徑雷達干涉技術生成數值地形模形，並探討影響干涉影像成像之因子。在研究中發現，在配對雷達影像像對過程中，除基線長度與時間間隔的因素外，兩影像的都普勒中心頻率差值亦為影響干涉影像成敗的重要因素；相差過大的都普勒中心頻率降造成干涉影像無法形成。 | |||
| 摘要(英) | Synthetic aperture radar interferometry （InSAR） is a new technique to explore the ground truth of the Earth. In general, synthetic aperture radar primarily is designed for mapping the scattering properties of the Earth’s surface. Many physical and geometric parameters of the imaged scene are recorded in SAR image pixels. The ground truth can be explored by extracting those parameters from SAR imagery. Interferometric SAR has been widely applied to generate the digital terrain model of an imaged area, and previous research results have demonstrated that the digital terrain generated by applying InSAR can reach high accuracy. The basic principle of InSAR is to measure the phase differences of at least two SAR images that are obtained at the same orbit position with two antennas or at different orbit positions with the same antenna. The microwave emitted from SAR satellites has better penetration capability than other electromagnetic waves with shorter wavelengths have, such that the surface of the Earth can be precisely determined without vegetation disturbances. The research applies those SAR imagery collected with ERS2 satellite. Based on the Doris, Deflt Object-oriented Radar Interferometric Software, developed by Deflt University, the digital terrain model of the northern part of Taiwan, especially the Taipei area, is generated. | |||
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